The correct option is
A Buxbaumia aphyllaMost of the bryophytes are autorophic but a few exceptions are there. For example,
Buxbaumia aphylla and
Mnium hornum are more or less saprophytic and grow upon organic matter such as rotten wood as the gametophytic stage is inconspicuous, highly reduced, thin, flat non green structures present on the substratum.
So, the correct answer is '
Buxbaumia aphylla'